Well, no one's really sure who killed Tutankhamun....there's speculation that it was Ay or Horemheb...but go to this website
http://dsc.discovery.com/anthology/unsolvedhistory/kingtut/kingtut.html
There was a Discovery Channel special on it that examined the "murder mystery" all detective like..._________________"Pharaoh he was a powerful man, with the ancient world in the palm of his hands, for all intents and purposes he, was Egypt, with a capital E..."